Botanical: Juglans nigra (LINN.)
Family: N.O. Juglandaceae
Synonyms---Carya. Jupiter's Nuts.
(Greek) Carya persica. Carya basilike.
(Roman) Nux persica. Nux regia.
Parts Used---Leaves, bark.
According to Dr. Royle Juglans regia extends from Greece and Asia Minor, over Lebanon and Persia, probably all along the Hindu-Kush to the Himalayas. It is abundant in Kashmir, and is found in Sirmore, Kumdon and Nepal. The walnuts imported into the plains of India are chiefly from Kashmir. Dr. Hooker states that in the Sikkim Himalaya, the Walnut inhabits the mountain slopes at an elevation of 4,000 to 7,000 feet. The Common Walnut, a large and handsome tree, with strong, spreading boughs, is not a native of Britain. Its native place is probably Persia. Other varieties of Walnut, the Black Walnut, the various kinds of Hickory, etc., are mostly natives of North America. The active principle of the whole Walnut tree, as well as of the nuts, is Nucin or Juglon. The kernels contain oil, mucilage, albumin, mineral matter, cellulose and water.